fix: Mails are sent to the organizer twice

The `ics` package doesn't support setting the `SCHEDULE-AGENT`
parameter, there is a PR (adamgibbons/ics#248),
but it is not merged.

This is a workaround that relies on the fact that the `ics` package does
not properly escape the `name` field of the organizer. In a perfect
world, they would merge the PR and create a new release, but this is
unfortunately not the world we live in.

refs calcom#9485

Author: dasJ

packages/lib/CalendarService.ts

@@ -152,7 +152,8 @@ export default abstract class BaseCalendarService implements Calendar {
         title: event.title,
         description: getRichDescription(event),
         location: getLocation(event),
-        organizer: { email: event.organizer.email, name: event.organizer.name },
+        // TODO Use `name`, `email`, and `scheduleAgent` once https://github.com/adamgibbons/ics/pull/248 is merged
+        organizer: { name: event.organizer.name + ":MAILTO:" + event.organizer.email + ":SCHEDULE-AGENT=CLIENT" },
         attendees: this.getAttendees(event),
         /** according to https://datatracker.ietf.org/doc/html/rfc2446#section-3.2.1, in a published iCalendar component.
          * "Attendees" MUST NOT be present
@@ -228,7 +229,8 @@ export default abstract class BaseCalendarService implements Calendar {
         title: event.title,
         description: getRichDescription(event),
         location: getLocation(event),
-        organizer: { email: event.organizer.email, name: event.organizer.name },
+        // TODO Use `name`, `email`, and `scheduleAgent` once https://github.com/adamgibbons/ics/pull/248 is merged
+        organizer: { name: event.organizer.name + ":MAILTO:" + event.organizer.email + ":SCHEDULE-AGENT=CLIENT" },
         attendees: this.getAttendees(event),
       });